Trial production and experiments of linear actuator with HTS bulk secondary

R. Muramatsu*, S. Sadakata, M. Tsuda, A. Ishiyama


研究成果: Conference article査読

24 被引用数 (Scopus)


To investigate characteristics of a linear actuator with high-temperature superconducting (HTS) bulk secondary, a short secondary type linear actuator has been designed and constructed. The actuator is comprised of an YBCO bulk secondary (mover) and copper windings with iron core (primary). A zero-field-cooled bulk located at the center of the actuator plays a role of generating thrust, while four field-cooled (trapped field) bulks are used for levitation and guidance of the secondary. We measured the starting thrust force and magnetic field distribution in the air gap. We developed a simulation program based on the finite element method (FEM) taking the voltage-current (E-J) characteristics of the bulk into consideration to investigate electromagnetic behaviors within the bulk exposed to a time-varying magnetic field. Agreement between experiment and simulation is good, and it validates the simulation program and the presented assumptions in the numerical approach. Using the simulation program, we investigated the dependency of n-value and critical current density of the bulk material on the magnetic flux density in the air gap and the starting thrust force. Supercurrent density within the bulk is a key factor for the magnetic flux density and the thrust force.

ジャーナルIEEE Transactions on Applied Superconductivity
1 II
出版ステータスPublished - 2001 3月
イベント2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
継続期間: 2000 9月 172000 9月 22

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学


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